fastmcp/docs/python-sdk/fastmcp-utilities-openapi-director.mdx
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---
title: director
sidebarTitle: director
---
# `fastmcp.utilities.openapi.director`
Request director using openapi-core for stateless HTTP request building.
## Classes
### `RequestDirector` <sup><a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/utilities/openapi/director.py#L28" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
Builds httpx.Request objects from HTTPRoute and arguments using openapi-core.
**Methods:**
#### `build` <sup><a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/utilities/openapi/director.py#L35" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
```python
build(self, route: HTTPRoute, flat_args: dict[str, Any], base_url: str = 'http://localhost') -> httpx.Request
```
Constructs a final httpx.Request object, handling all OpenAPI serialization.
**Args:**
- `route`: HTTPRoute containing OpenAPI operation details
- `flat_args`: Flattened arguments from LLM (may include suffixed parameters)
- `base_url`: Base URL for the request
**Returns:**
- httpx.Request: Properly formatted HTTP request